Polarization-sensitive pulse reconstruction by momentum-resolved photoelectron streaking

Area of Science:

• Surface science
• Ultrafast spectroscopy
• Quantum dynamics

Background:

• Precise knowledge of surface electric fields is essential for controlling dynamic surface processes.
• Pump-probe experiments require accurate electric field data near metallic and dielectric surfaces.

Purpose of the Study:

• To develop and validate a model for reconstructing electric fields in immediate surface proximity.
• To enable better control of dynamic surface processes using pump-probe techniques.

Main Methods:

• Utilizing data from photoelectron THz-streaking experiments.
• Employing an angle-resolved electron analyzer.
• Performing Monte-Carlo simulations to model streaking experiments on various surfaces with diverse initial electron momentum distributions.

Main Results:

• Successfully reconstructed the effective electric field at the surface.
• Validated the proposed model's effectiveness.
• Identified optimal energy regimes for pulse reconstruction.

Conclusions:

• The developed model provides a reliable method for reconstructing surface electric fields.
• This approach enhances the capability to control dynamic surface processes.
• The findings offer guidance for optimizing experimental parameters in ultrafast spectroscopy.